Rigorous trainer selection
Each trainer is validated on three criteria: hands-on field expertise, proven pedagogy and alignment with your industry.
- Triple validation: technical, pedagogical, sectoral.
- Minimum rating 4.8/5 over the last 12 sessions.
Learning objectives
- Integrate Web3.js for secure multi-chain provider connections
- Develop advanced interactions with complex smart contracts
- Manage events and real-time subscriptions for scalable dApps
- Optimize gas and performance in production environments
- Implement advanced security against reentrancy and front-running attacks
- Deploy and monitor full-stack dApps with Web3.js
- Create automated scripts for testing and CI/CD deployments
The Learni story
Founded by passionate learning and innovation experts, Learni's mission is to make professional training accessible to everyone, anywhere in the world. Our team operates in major hubs — London, New York, Boston — and internationally, to support talents and organizations in upskilling.
Don't let this gap widen
Why this program matters
Without this upskilling, your team accumulates a technological gap that translates directly into productivity loss.
Organizations that don't train their talents on key topics see their competitiveness drop.
Every quarter without training is a gap widening with competitors who invest.
The cost of inaction quickly exceeds that of well-targeted training.
Program
Module 1Advanced Web3.js Fundamentals: Providers and Utils (tools, connections, initial scripts)
Dive into the installation and configuration of Web3.js 4.x, connect to various providers like Infura or Alchemy through practical exercises, handle accounts, balances, and batched transactions on testnets, create your first utility scripts for signing and broadcasting, test live on Sepolia to validate robustness and scalability, leave with ready-to-use templates that boost your immediate productivity.
Module 2Smart Contract Interactions: Calls, Transactions, ABI (methods, encoding, multisig)
Master view/pure calls and state-changing mutations with dynamic ABIs, encode/decode complex parameters via exercises on ERC-721/1155 contracts, manage multisig and batch transactions for gas savings, simulate interactions on mainnet forks with Hardhat, develop a functional decentralized wallet, integrate log parsing for advanced debugging, experience the thrill of deploying your own interactive contracts in real-time.
Module 3Events and Subscriptions: Listening, Filters, IPFS (WebSockets, optimized polling)
Set up WebSocket subscriptions for real-time events on Polygon and Optimism, filter logs with advanced topics and bloom filters, integrate IPFS for decentralized metadata via NFT dApp exercises, optimize hybrid polling for maximum reliability, manage automatic reconnections and backoff strategies, build a live transaction monitoring dashboard, feel the power of a reactive dApp that captures every blockchain event instantly.
Module 4Production dApps: Security, Optimization, Monitoring (audits, MEV, CI/CD deliverables)
Secure against reentrancy and sandwich attacks with Web3.js guards, profile gas via batch estimations and optimize loops, integrate TheGraph for indexing queries, deploy full-stack dApps with React/Vue through practical workshops, audit your code with integrated Slither, set up CI/CD GitHub Actions for automated tests, finalize a capstone project deployed on Vercel/IPFS, leave certified with a professional portfolio that impresses recruiters.
Evaluation method
- Daily technical quizzes, peer code reviews, final deployed dApp project, Qualiopi certification.
Learning method
- 100% hands-on with real Ethereum cases, live coding, individualized feedback.
Methods, materials and delivery
The Training Web3.js - Develop Advanced Blockchain dApps program is delivered onsite or remote (blended-learning, e-learning, virtual classroom, remote presence). At Learni, an industry-certified training organization, every program is built to maximize skills acquisition regardless of the chosen format.
The trainer alternates between demonstrative, interrogative and active methods (through hands-on labs and/or scenarios). This pedagogical approach guarantees concrete learning that's immediately applicable at work.
Equipment required
For the smooth delivery of the Training Web3.js - Develop Advanced Blockchain dApps program, the following equipment is required:
- Mac or PC computers, high-speed fiber internet, whiteboard or flipchart, projector or interactive touch screen (for remote sessions)
- Training environments installed on workstations or accessible online
- Course materials, hands-on exercises and complementary resources
- Post-training access to materials and educational resources
For intra-company training on a site outside Learni, the client commits to providing all required teaching materials (computers, internet, etc.) for the smooth delivery of the program in line with the prerequisites in the communicated program.
* contact us for remote delivery feasibility** ratio varies depending on the program
Skills assessment methods
Assessment of skills acquired during the Training Web3.js - Develop Advanced Blockchain dApps program is performed through:
- During training: case studies, hands-on labs and professional scenarios
- End of training: self-assessment questionnaire and skills evaluation by the trainer
- After training: completion certificate detailing acquired skills
Program accessibility
Learni is committed to making its programs accessible. All our programs are accessible to people with disabilities. Our teams are available to adapt the pedagogical methods to your specific needs. Please contact us for any adjustment request.
Enrollment terms and lead times
Learni programs are available inter-company and intra-company, onsite or remote. Enrollments are possible up to 48 business hours before the program starts. Our programs are eligible for corporate funding paths. Contact us to discuss your training project and funding options.
Verified reviews
What our learners
★★★★★
« cool, j'ai appris des trucs »
★★★★★
« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »
★★★★★
« la formation dev etait intense mais grave bien. merci Anthony Khelil »
★★★★★
« 😊👍 »
★★★★★
« bien 👍 »
★★★★★
« Allan Busi t'es au top, continue comme ça. formation géniale »
★★★★★
« cool, j'ai appris des trucs »
★★★★★
« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »
★★★★★
« la formation dev etait intense mais grave bien. merci Anthony Khelil »
★★★★★
« 😊👍 »
★★★★★
« bien 👍 »
★★★★★
« Allan Busi t'es au top, continue comme ça. formation géniale »
★★★★★
« cool, j'ai appris des trucs »
★★★★★
« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »
★★★★★
« la formation dev etait intense mais grave bien. merci Anthony Khelil »
★★★★★
« 😊👍 »
★★★★★
« bien 👍 »
★★★★★
« Allan Busi t'es au top, continue comme ça. formation géniale »
Our method
Training quality, guaranteed at every step
Before, during, after: we frame the brief, introduce the trainer, tailor the content and measure impact. You stay in control from kickoff to wrap-up.
You meet the trainer beforehand
30-minute video call between you and the selected trainer to validate the fit, adjust content and clear any final doubts.
- Live briefing on goals and team context.
- Veto right — we swap the trainer for free if needed.
Content tailored to your context
No recycled slides. The syllabus is reworked from your real cases: tools, constraints, vocabulary, ongoing projects.
- Hands-on cases drawn from your stack and projects.
- Program co-written then validated by your team.
Continuous quality follow-up
Live evaluations, 30/90/180-day check-ins and a consolidation plan. If the impact misses the mark, we rework it.
- NPS, knowledge quizzes and skills self-assessment.
- Satisfaction guarantee: fully satisfied or free rework.
A simple promise: you don't pay to discover the trainer on day one. Everything is validated upfront, by you.
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